| Index | Delaware | Ohio | National |
| Average Test Scores | 75% | 61% | 48% |
| Student/Teacher ratio | 13:1 | 17:1 | 16:1 |
| Total public schools | 17 | 3,650 | 79,221 |
| Total private schools | 2 | 1,000 | 24,874 |
| Total post-secondary schools | 3 | 393 | 7,963 |
| Index | Delaware | Ohio | National |
| Completed 8th grade | 90.3% | 86.9% | 84.3% |
| Completed high school | 89.6% | 85.6% | 83.0% |
| Completed some college | 63.6% | 55.7% | 59.4% |
| Completed associate degree | 40.6% | 35.1% | 38.5% |
| Completed bachelors | 34.3% | 26.7% | 30.3% |
| Completed masters | 13.3% | 10.0% | 11.5% |
| Completed professional degree | 3.0% | 2.7% | 3.3% |
| Completed doctorate | 1.7% | 1.1% | 1.3% |
There are a total of 17 public schools, 2 private schools and 3 post-secondary schools in Delaware. Using the proficiency score averages, the average test scores for Delaware, OH schools is 75%. The average student to teacher ratio is 13:1. In Delaware, OH, an average of 90.3% of students have completed 8th grade and an average of 89.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Ostrander, OH | 904 | 92% | 91.7% |
| Galena, OH | 753 | 89% | 85.9% |
| Powell, OH | 13,353 | 88% | 82.9% |
| New Albany, OH | 11,085 | 87% | 81.3% |
| Dublin, OH | 47,824 | 81% | 68.7% |
| Delaware, OH | 41,818 | 75% | 55.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Spring Hill, TN | 41,797 | 52% | 7.8% |
| Apache Junction, AZ | 41,863 | 35% | 27.3% |
| Bell Gardens, CA | 41,770 | 30% | 37.4% |
| Midland, MI | 41,922 | 54% | 12.7% |
| Puyallup, WA | 41,666 | 56% | 16.0% |
| Delaware, OH | 41,818 | 75% | 55.2% |
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